def add(number1, number2):
    return number1 + number2


sum = add(1, 2)
print(sum)


# 返回多个结果
def add2(number1, number2=6):
    return number1 + number2, number1, number2


result = add2(2)
print(result)
result2, a, b = add2(4)
print(result2, a, b)
